package com.qingcheng.service.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.qingcheng.dao.BrandMapper;
import com.qingcheng.dao.SpecMapper;
import com.qingcheng.service.goods.SkuSearchService;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;

import javax.swing.text.Highlighter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class SkuSearchServiceImpl implements SkuSearchService {
    @Autowired
    private RestHighLevelClient restHighLevelClient;

    @Autowired
    private BrandMapper brandMapper;

    @Autowired
    private SpecMapper specMapper;

    /**
     * 根据条件查询
     *
     * @param searchMap
     * @return
     */
    @Override
    public Map search(Map<String, String> searchMap) {
        // 1 封装查询请求
        SearchRequest searchRequest = new SearchRequest("sku");
        searchRequest.types("doc");  //设置查询类型

        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder(); //query

        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();//布尔查询器

        // 1.1 关键字搜索
        MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("name", searchMap.get("keywords"));
        boolQueryBuilder.must(matchQueryBuilder);

        //1.2 商品分类信息进行过滤
        if (searchMap.get("category") != null) {
            TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("categoryName", searchMap.get("category"));
            boolQueryBuilder.filter(termQueryBuilder);
        }

        //1.3 品牌信息进行过滤
        if (searchMap.get("brand") != null) {
            TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("brandName", searchMap.get("brand"));
            boolQueryBuilder.filter(termQueryBuilder);
        }

        //1.4 规格信息进行过滤
        for (String key : searchMap.keySet()) {
            if (key.startsWith("spec.")) {  //如果是规格参数
                TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery(key+".keyword", searchMap.get(key));
                boolQueryBuilder.filter(termQueryBuilder);
            }
        }

        //1.5 价格过滤
        if (searchMap.get("price")!=null) {
            String[] prices = searchMap.get("price").split("-");
            if(!prices[0].equals("0")){  //最低价格不等于0
                RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("price").gte(prices[0]+"00");
                boolQueryBuilder.filter(rangeQueryBuilder);
            }
            if(!prices[1].equals("*")){  //最高价格不大于prices[1]
                RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("price").lte(prices[1]+"00");
                boolQueryBuilder.filter(rangeQueryBuilder);
            }


        }






        // 根据分类进行分组查询
        TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("sku_category").field("categoryName");
        searchSourceBuilder.aggregation(termsAggregationBuilder);

        searchSourceBuilder.query(boolQueryBuilder);

        // 分页查询
        Integer pageNo =Integer.parseInt(searchMap.get("pageNo")); //页码
        Integer pageSize =30;//每页显示的条数
        //起始记录下标
        Integer index =(pageNo-1)*pageSize;
        searchSourceBuilder.from(index); //开始索引
        searchSourceBuilder.size(pageSize); //每页显示的条数

        //排序设置
        String sort = searchMap.get("sort"); //排序字段
        String sortOrder = searchMap.get("sortOrder"); //排序规则
        if(!"".equals(sort)){
            searchSourceBuilder.sort(sort, SortOrder.valueOf(sortOrder));
        }

        //高亮设置
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("name").preTags("<font style='color:red'>").postTags("</font>");
        searchSourceBuilder.highlighter(highlightBuilder);


        searchRequest.source(searchSourceBuilder);


        // 2封装查询结果
        Map resultMap = new HashMap();
        try {
            SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
            SearchHits searchHits = searchResponse.getHits();
            long totalHits = searchHits.getTotalHits();
            System.out.println("记录数" + totalHits);
            SearchHit[] hits = searchHits.getHits();
            //2.1 商品列表
            List<Map<String, Object>> resultList = new ArrayList<>();
            for (SearchHit hit : hits) {
                Map<String, Object> skuMap = hit.getSourceAsMap();
                //高亮处理
                Map<String, HighlightField> highlightFields = hit.getHighlightFields();
                HighlightField name = highlightFields.get("name");
                Text[] fragments = name.fragments();
                skuMap.put("name",fragments[0].toString());//用高亮名称代替原有名称

                resultList.add(skuMap);
            }
            resultMap.put("rows", resultList);

            //2.2 商品分类列表
            Aggregations aggregations = searchResponse.getAggregations();
            Map<String, Aggregation> aggregationMap = aggregations.getAsMap();
            Terms terms = (Terms) aggregationMap.get("sku_category");

            List<? extends Terms.Bucket> buckets = terms.getBuckets();
            List<String> categoryList = new ArrayList<>();
            for (Terms.Bucket bucket : buckets) {
                categoryList.add(bucket.getKeyAsString());
            }
            resultMap.put("categoryList", categoryList);

            //categoryName条件
            String categoryName = "";
            if (searchMap.get("category") == null) {  //如果没有分类条件
                if (categoryList.size() > 0) {
                    categoryName = categoryList.get(0);//就取第一个值
                }
            } else {
                categoryName = searchMap.get("category"); //如果有值 就取值
            }

            //2.3 品牌列表
            if (searchMap.get("brand") == null) {

                List<Map> brandList = brandMapper.findBrandListByCategoryName(categoryName);
                //查询品牌名称
                resultMap.put("brandList", brandList);
            }

                 //2.4 规格列表
            List<Map> specList = specMapper.findSpecListByCategoryName(categoryName);
//            System.out.println(specList);
            for (Map spec : specList) {
                //NullPointerException
//                System.out.println(spec);
                String optionList = (String) spec.get("options");
                String[] options = optionList.split(",");
                spec.put("options",options);
            }

            resultMap.put("specList", specList);

            //2.5 计算总页数
            long totalCount = searchHits.getTotalHits();//总记录数
            long totalPages = (totalCount%pageSize==0)?totalCount/pageSize:(totalCount/pageSize+1); //总页数
            resultMap.put("totalPages",totalPages);
            System.out.println(totalPages);


        } catch (IOException e) {
            e.printStackTrace();
        }
        return resultMap;
    }

}
